Influence of sublethal exposure to triflumuron on the biological performance of Tetranychus urticae Koch (Acari: Tetranychidae)

摘要

Effects of sublethal exposure to triflumuron on the biological performance of the two-spotted spider mite Tetranychus urticae Koch were analysed under laboratory conditions. Survivorship was affected by the compound. Triflumuron caused a reduction both in the percentage of eggs that developed to adults and in the survival of adult stage. Triflumuron also affected the fecundity. The net reproductive rate (Ro), the intrinsic rate of increase (rm), and the finite rate of increase (k) of treated femaleswere lower than in those non treated, resulting in a reduction of population growth. These results suggest that triflumuron could be a valuable addition in integrated pest management programs of T. urticae, although more laboratory, semi-field and fieldtesting is required.